<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRole">添加角色</el-button>
        </el-col>
      </el-row>

      <el-table :data="rolesList" stripe border>
        <!-- 展开列 -->
        <el-table-column type="expand"> 
          <template v-slot="scope">
            <el-row :class="['bdBottom', i1 === 0 ? 'bdTop' : '','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightsById(scope.row,item1.id)">
                  {{item1.authName}}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二三级权限 -->
              <el-col :span="19">
                <el-row :class="[i2 === 0 ? '':'bdTop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <!-- 二级权限 -->
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightsById(scope.row,item2.id)">
                      {{item2.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id"
                     closable @close="removeRightsById(scope.row,item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"> </el-table-column>
        <el-table-column label="角色名称" prop="roleName"> </el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"> </el-table-column>
        <el-table-column label="操作"> 
          <template v-slot="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="getRights(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="getRightsDialogVisible"
      width="30%" @close="getRightsDialogClosed">
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all 
      :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="getRightsDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default{
  data(){
    return {
      // 角色列表
      rolesList: [],
      // 获取权限对话框隐藏
      getRightsDialogVisible:false,
      // 权限列表
      rightsList: [],
      // 树数据
      treeProps:{
        label:'authName',
        children:'children'
      },
      defKeys: [],
      // 当前准备分配权限的角色的id
      roleId:''
    }
  },
  created(){
    this.getRolesList()
  },
  methods:{
    // 获取角色列表
    async getRolesList(){
      const {data: res} =await this.$http.get('roles')
      if(res.meta.status!==200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolesList = res.data
    },
    // 添加角色
    async addRole(){
    const {data: res} = await this.$http.post('roles')
    },
    // 通过id移除权限
    async removeRightsById(role,rightId){
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch((error=>error))
        if (confirmResult !== 'confirm') {
          return this.$message.info('已取消删除')
        }
        // console.log(confirmResult);
        // console.log(role.id);
        // console.log(rightId);
        const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status !==200) {
          return this.$message.error('删除权限失败！')
        }
        this.$message.success('删除权限成功！')
        role.children = res.data
    },
    // 获取权限
    async getRights(role){
    this.roleId = role.id
    const {data: res} = await this.$http.get('rights/tree')
    if (res.meta.status !== 200) {
      return this.$message.error('获取权限数据失败！')
    }
    this.rightsList = res.data
    this.getLeafKey(role,this.defKeys)
    this.getRightsDialogVisible = true
    },
    // 递归获得三级权限的id，保存到defKeys
    getLeafKey(node,arr){
      // console.log(node);
      // console.log(arr);
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKey(item,arr)
      })
    },
    // 监听权限对话框的关闭事件
    getRightsDialogClosed(){
      this.defKeys= []
    },
    // 点击为角色分配权限
    async  allotRights(){
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ]
      const idSrt = keys.join(',')
      const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idSrt})
      if (res.meta.status !==200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.getRightsDialogVisible = false
    }
  }
}
</script>
<style lang="less" scoped>
.el-card{
  margin-top: 15px;
}
.el-tag{
  margin: 6px;
}
.bdTop{
  border-top:1px solid #eee;
}
.bdBottom{
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>